Saint-Maurice Abbey — crypt hauntings

The supplied research material does not contain historical, folkloric, or witness information about Saint-Maurice Abbey or any alleged crypt hauntings. The single source consulted is a Wikipedia article on Thérèse of Lisieux and does not mention the abbey, its crypt, reported phenomena, associated entities, theories, or visitor access. Because no relevant information is present in the provided source, no factual claims about hauntings, apparitions, or other paranormal activity at Saint-Maurice Abbey can be supported based on the material available for this research brief. Further investigation using directly relevant primary or secondary sources is required to document any credible reports or history.